Improvement in dyeing morocco and other leather



NIoHOLAs MARY, or NEW YORK, N. Y.,

PATENT QEETOE.

ASSIGNOR TO HIMSELF AND GEORGE G. GUIN, OF SAME PLAGE.

IMPROVEMENT lN DVEING MOROCCO AND OTHER LEATHER.

Specification forming part of Letters Patent No. 146,769, dated January 27, 1874; application tiled July 17, 1873.

" city, county, and State of .New York, have invented a new and useful Improvement in Process for Dyeing Morocco and other Leather;

and I do hereby declare the following to` be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawing, forming part ot' this speciication, which drawing represents a yertical section ot' an apparatus used by me in carrying out my intention.

This invention relates to dyeing Morocco and other leather; and consists in an improved process or method yvhercby greatcfunitormity is attained in the shade or color imparted to the articles, and theexpense is greatly reduced, a-s compared to the old method ot' dyeing such articles.

In carrying out my process, I provide a tub or Yat of convenient size, according tothe number ot' skins to be dyed at one time, and arrange auheel with radial arms or bladessix or more in numberto revolve. therein.

i The eoloringliqnor is put into the yat, and heated by steam or other means to the requisite temllerature. The sk ins being introduced into the vat, the wheel is put in motion, and

`with its ends or journals resting in journalboxes at the ends of the tub, and the apparatus is so constructed and arranged with suitable gearing, or belt and pulleys, that the wheel can be kept constantly rotating While the process of dyeing is going on. The paddles of the Wheel may be of six or any desired number, and should be set down far enough in the tub to impart motion to the bath or coloring-1iquid placed therein, and to stir up the skins which are being dyed in the bath, and open and separate them from each other from time to time. -1 The bath or coloring-liquid in the tub is heated to the proper temperature by means of steam passed through the hollow space l) in the bottom, sides, and ends of the tub, or steam may be introduced directly into the bath, if desired. The skins to be dyed being placed in the bath in the subjected to the process once or loftener and for vai-yin g periods7 according-to the colors or dyes used-as, for example, in usingsimple colors the skins are subjected to a single bath compound colorsareuscd the skins, are subjected to two baths in succession for a little longer time, and, in the case ot' shades requiring` the use ot' iron, the skins are. subjected to three baths, and fonabout half an hour longer time.

y this method of `dyeing morocco or other skins a more uniform shade is imparted to the entire quantity dyed together than can be obtained by the old hand process, particularly in shades for which iron is used.

M y process greatly diminishes the labor ot' dyeing these articles in comparison with the old method, one Workman, by my process, be` ing` able to dye about ten dozen skins of the same shade per day, and with 'the help of two NIcHoLAs MARY.

'itnesses J. VAN SANTYOORD, Y E. F. KASTENHUBER.

tub, the paddle-wheel is rotated, and the skins\ for about from thirty to sixty minutes. Where a other men he can manage four tubs, and dye y 

